Method for production of polyelectrolyte membranes and fuel cell
US7396615B1 · kind B1 · utility
5Cited by
4References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1999 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Dec 11, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for producing a polyelectrolyte membrane, including the step of immersing a basic polymer such as a polybenzimidazole in a strong acid having a concentration sufficient to impregnate the basic polymer with six or more strong acid molecules per polymer repeating unit of the basic polymer at a temperature of not less than 30° C. for a period of 5 h or less, as well as a fuel battery having the polyelectrolyte membrane. Hence, the times required to immerse the basic polymers in the strong acids can be shortened and the proton conductivity of the polyelectrolyte membranes can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.